Add 15/9 and 90/35, Solve 1 6/9 + 2 20/35 as a fraction

Add 15/9 and 90/35

1^st number: 1 6/9, 2^nd number: 2 20/35

15/9 + 90/35 is 89/21.

Find the least common denominator or LCM of the two denominators:
LCM of 9 and 35 is 315

Next, find the equivalent fraction of both fractional numbers with denominator 315
For the 1st fraction, since 9 × 35 = 315,
15/9 = 15 × 35/9 × 35 = 525/315
Likewise, for the 2nd fraction, since 35 × 9 = 315,
90/35 = 90 × 9/35 × 9 = 810/315
Add the two like fractions:
525/315 + 810/315 = 525 + 810/315 = 1335/315
1335/315 simplified gives 89/21
So, 15/9 + 90/35 = 89/21
In mixed form: 45/21

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